90° cast basalt lined elbow designed for extreme wear resistance in slurry and ash conveying pipelines.
The 90° cast basalt lined elbow is one of the most critical components in abrasive pipeline systems, where the direction of material flow changes sharply and wear intensity significantly increases.
In slurry, ash and mineral transport systems, elbows experience much higher wear rates compared to straight pipes due to particle impact and turbulence at the turning point.
Cast basalt lining provides a highly durable solution by creating an extremely hard internal surface resistant to continuous abrasion.
This type of elbow is widely used in mining, power plants, cement plants and dredging systems where reliable flow direction changes are required under severe wear conditions.
The steel outer shell ensures structural integrity while the basalt lining protects against internal erosion.
As a result, service life is significantly extended compared to standard carbon steel elbows.
In pipeline systems, the 90° elbow is the most aggressive flow transition point, where solid particles directly impact the outer radius of the bend.
This creates localized erosion, wall thinning and eventual leakage if no protective lining is used.
Cast basalt lining eliminates this failure mode by providing a hard, erosion-resistant surface.
| Layer | Function |
|---|---|
| Steel Outer Shell | Provides pressure resistance and mechanical strength. |
| Cast Basalt Lining | Protects against abrasion and particle erosion. |
| Bonding Layer | Ensures firm adhesion between steel and basalt lining. |
In abrasive conveying systems, wear does not occur only in straight pipes but mainly at fittings such as elbows, bends and junctions.
Using only partial protection leads to uneven wear and early failure at weak points in the pipeline.
A complete cast basalt lined system ensures uniform protection across all pipeline components, significantly improving overall reliability.
| Property | Typical Value |
|---|---|
| Material | Fused Cast Basalt |
| Hardness | Mohs 8 – 9 |
| Density | 2.9 – 3.1 g/cm³ |
| Compressive Strength | ≥ 450 MPa |
| Water Absorption | < 0.2% |
| Working Temperature | -40°C to 350°C |
| Abrasion Resistance | Excellent |
| Chemical Resistance | Excellent |
Specifically designed for elbow impact areas.
Significantly reduces replacement frequency.
Maintains efficiency in directional changes.
Lower maintenance and downtime costs.
Cast basalt is a highly wear-resistant and corrosion-resistant lining material widely used in pipes, chutes, bunkers, cyclones, and hoppers.
Usage
Installation
Cast basalt has become the global standard for ash slurry pipelines in fossil-fuel power stations and other heavy industries. It significantly extends equipment service life in environments with severe abrasion and corrosion.
It is commonly used as a cost-effective lining material for steel, cast iron, rubber, or polyurethane equipment, offering 5–10 times longer service life than traditional materials.
Why are 90° elbows more critical than straight pipes?
Because flow impact is concentrated at the turning point, causing higher wear rates.
Can cast basalt lining handle high velocity slurry?
Yes, it is designed for high abrasion and high velocity particle flow systems.
Is it suitable for power plant ash systems?
Yes, it is widely used in fly ash and bottom ash pipelines.
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